The Omnigrid  non-slip rulers from Prym are great for patchwork and quilting. Just press down and the backing ""grips"" the fabrics so you can rotary-cut with confidence.  Easy to work with on dark and light fabrics. The yellow/black screen printing enables accurate markers of both dark and bright fabrics.   Every crafter needs this!

Dimensions:  6.5 inch x  6.5 inch